I have a 5 gallon Marine land Hex and it seems that my betta hates the filter....I woke up Tuesday morning to find him swimming him circles like he was psychotic.... So turned off the filter..... This morning he has built a huge bubble nest over the filter.... Which says to me.... Lady don't u even think about plugging that thing in..... What do I do now? Can I get a lid made for it or should I try and find a different filter??

You can try to baffle it or you can go without a filter. I had one of my bettas in an unfiltered tank because he is an elephant ear and any water movement pushes him around. I didn't find it to be difficult to take care of but you do have to do more water changes. I did one 50% and one 100% water change a week. He was in a 2.5 gallon though, you might be able to get away with two 50% water changes.

Yeah, either affix some sponge over the intake of the filter or get some pre-filter sponges. The Fluval ones work great and since I have peat moss balls in each tank the peat and debris get sucked into the pre-filter make the flow even weaker, and also assuring that all the water going into the filter is coming into contact with the peat (which I use to slightly soften the hard city water here).